Ben 10 triple pack is a great bargain. It's way better than getting all of them seperately, if you will. All of these are great games.
Ben 10: Protector of earth: Very fun. Follows the story of ten year old Ben Tennyson who suddenly finds a watch called the Omnitrix that lets you turn into a wide selection of aliens. Big bosses, fun gameplay, great game.
Ben 10 Alien Force: Ben 10 is now approximently 15-ish, and now has even newer aliens than he did before. This time, Kevin Levin has joined the party! Same deal as Protector of Earth. Big bosses fun gameplay, etc.
Ben 10: Vilgax Attacks: Not much different from Alien force except for one crucial fact: Vilgax is back in town. (and he's TNT) You do pretty much the same stuff as in alien force, fight morph, and have fun.
The only two flaws are:It can get too repetitive, and pretty poor graphics. So it's an eight.